160981291 has 4 divisors (see below), whose sum is σ = 166532400. Its totient is φ = 155430184.

The previous prime is 160981277. The next prime is 160981307. The reversal of 160981291 is 192189061.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 160981291 - 2²¹ = 158884139 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 160981291.

It is not an unprimeable number, because it can be changed into a prime (160981201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2775511 + ... + 2775568.

It is an arithmetic number, because the mean of its divisors is an integer number (41633100).

Almost surely, 2^160981291 is an apocalyptic number.

160981291 is a deficient number, since it is larger than the sum of its proper divisors (5551109).

160981291 is an equidigital number, since it uses as much as digits as its factorization.

160981291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5551108.

The product of its (nonzero) digits is 7776, while the sum is 37.

The square root of 160981291 is about 12687.8402811511. The cubic root of 160981291 is about 543.9911094189.

The spelling of 160981291 in words is "one hundred sixty million, nine hundred eighty-one thousand, two hundred ninety-one".